A novel polymer inclusion membrane applied in chromium (VI) separation from aqueous solutions

Gherasim, Cristina-Veronica; Bourceanu, Gelu; Olariu, Romeo Iulian; Arsene, Cecilia

doi:10.1016/j.jhazmat.2011.09.082

Cited by 102 publications

(39 citation statements)

References 38 publications

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“…The commercial quaternary ammonium salt Aliquat 336 (trioctylmethylammonium chloride) has extensively been used as a carrier in PIMs forming suitable membranes in either CTA or PVC polymers (Vázquez et al 2014). PIMs incorporating Aliquat 336 have been shown to effectively transport anionic species in a wide range of applications since they are suitable to transport organic compounds such as antibiotics (GarciaRodríguez et al 2015), inorganic anions (Nagul et al 2013;Cho et al 2011), or metallic species like Cd (Pont et al 2008) or Cr (Gherasim et al 2011), among others. This extractant has the particularity that it is an ionic liquid (IL) at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Exploring new DGT samplers containing a polymer inclusion membrane for mercury monitoring

Turull

Elías

Fontàs

et al. 2016

Environ Sci Pollut Res

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A polymer inclusion membrane (PIM) made of cellulose triacetate as a polymer and the task specific ionic liquid (IL) trioctylmethylammonium thiosalicylate (TOMATS) was assembled as a new Diffusive Gradients in Thin film (DGT) device to test its efficiency as a binding phase for mercury (Hg) monitoring. The effect of IL content was assessed, showing that higher TOMATS percentage is better for short deployment studies (up to hours), whereas for long-term exposure (up to days), a lower content can be more suitable. Different configurations of PIM-DGT samplers have been tested under controlled conditions and compared with in-house DGT conventional ones, manufactured with thiol groups as resin layer, for the determination of labile Hg. According to our results, a nonlinear accumulation profile of Hg with deployment time for the different designs of PIM-DGT was observed, limiting the range of applicability of the DGT technique. Promising results for the efficient removal of Hg from aqueous solutions and/or environmental monitoring studies were obtained with TOMATS.

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Section: Introductionmentioning

confidence: 99%

Exploring new DGT samplers containing a polymer inclusion membrane for mercury monitoring

Turull

Elías

Fontàs

et al. 2016

Environ Sci Pollut Res

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“…[12][13][14][15][16][17][18] The extraction mechanism with PVC-based PIMs containing Aliquat 336 is similar to that with Aliquat 336 in liquid-liquid extraction. 19,20 However, PVC-based PIMs containing Aliquat 336 have a disadvantage; i.e.…”

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confidence: 82%

Improvement of Chromium(VI) Extraction from Acidic Solutions Using a Poly(vinyl chloride)-based Polymer Inclusion Membrane with Aliquat 336 as the Carrier

et al. 2017

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An important reason for the inefficient extraction of Cr(VI) from its acidic solutions into polymer inclusion membranes (PIMs), consisting of poly(vinyl chloride) as the base-polymer and Aliquat 336 as the carrier, was found to be associated with the leaching of Aliquat 336 from the PIMs into the solutions, where it subsequently reduced the anionic Cr(VI) species to cationic Cr(III) species. The PIM extraction efficiency for Cr(VI) was significantly improved by the addition of NaNO3 to the solutions, which suppressed the leaching of Aliquat 336 and the reduction of Cr(VI) to Cr(III).

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“…Aliquat 336 is a good extractant for selective and efficient transport of numerous metal ions [2][3][4][5][6][7]. Aliquat 336, a commercial name for tricaprylylmethylammonium chloride is a quaternary ammonium salt which is insoluble in water.…”

Section: Introductionmentioning

confidence: 99%

The effect of aging on thermomechanical and metal extraction properties of poly (vinyl chloride)/Aliquat 336 polymer inclusion membranes

Halim

Whitten

Nghiem

2016

Desalination and Water Treatment

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Nghiem, L. D. (2016). The effect of aging on thermomechanical and metal extraction properties of poly (vinyl chloride)/Aliquat 336 polymer inclusion membranes. Desalination and Water Treatment, 57 (7), 3298-3303.The effect of aging on thermomechanical and metal extraction properties of poly (vinyl chloride)/Aliquat 336 polymer inclusion membranes AbstractThe impact of aging PVC/Aliquat 336 polymer inclusion membranes (PIMs) on their thermomechanical properties and heavy metal extraction performance was investigated. The results show that freshly prepared PIMs contain residual tetrahydrofuran (THF) which was used as the solvent for membrane manufacture. Removal of some residual THF by membrane aging resulted in notable changes in the thermomechanical properties of the PIMs. By aging the membrane for 1 week at 40°C, the glass transition increased from 42 to 55°C. In addition, while the melting temperature (Tm) of the Aliquat 336 component could not be determined for freshly prepared PIMs, the aged membrane showed a clear Tm value of −19°C. Metal extraction capacity was not affected by membrane aging. AbstractThe impact of aging PVC/Aliquat 336 polymer inclusion membranes (PIMs) on their thermomechanical properties and heavy metal extraction performance was investigated. The results show that freshly prepared PIMs contains residual tetrahydrofuran (THF) which was used as the solvent for membrane manufacture. Removal of some residual THF by membrane aging resulted in notable changes in the thermomechanical properties of the PIMs. By ageing the membrane for 1 week at 40 °C the glass transition increased from 42 to 55 °C. In addition, while the melting temperature (T m ) of the Aliquat 336 component could not be determined for freshly prepared PIMs, the aged membrane showed a clear T m value of -19 °C. Metal extraction capacity was not affected by membrane aging.

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A novel polymer inclusion membrane applied in chromium (VI) separation from aqueous solutions

Cited by 102 publications

References 38 publications

Exploring new DGT samplers containing a polymer inclusion membrane for mercury monitoring

Exploring new DGT samplers containing a polymer inclusion membrane for mercury monitoring

Improvement of Chromium(VI) Extraction from Acidic Solutions Using a Poly(vinyl chloride)-based Polymer Inclusion Membrane with Aliquat 336 as the Carrier

The effect of aging on thermomechanical and metal extraction properties of poly (vinyl chloride)/Aliquat 336 polymer inclusion membranes

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